grpck - phpMan

GRPCK(8)                                                              GRPCK(8)



NAME
       grpck - verify integrity of group files

SYNOPSIS
       grpck [-r] [group shadow]

DESCRIPTION
        grpck verifies the integrity of the system authentication information. All entries
       in the /etc/group and /etc/gshadow are checked to see that the entry has the proper
       format and valid data in each field. The user is prompted to delete entries that
       are improperly formatted or which have other uncorrectable errors.

       Checks are made to verify that each entry has:

       ·  the correct number of fields

       ·  a unique group name

       ·  a valid list of members and administrators

       The checks for correct number of fields and unique group name are fatal. If the
       entry has the wrong number of fields, the user will be prompted to delete the
       entire line. If the user does not answer affirmatively, all further checks are
       bypassed. An entry with a duplicated group name is prompted for deletion, but the
       remaining checks will still be made. All other errors are warnings and the user is
       encouraged to run the groupmod command to correct the error.

       The commands which operate on the /etc/group file are not able to alter corrupted
       or duplicated entries.  grpck should be used in those circumstances to remove the
       offending entry.

OPTIONS
       By default, grpck operates on the files /etc/group and /etc/gshadow. The user may
       select alternate files with the group and shadow parameters. Additionally, the user
       may execute the command in read-only mode by specifying the -r flag. This causes
       all questions regarding changes to be answered no without user intervention.  grpck
       can also sort entries in /etc/group and /etc/gshadow by GID. To run it in sort mode
       pass it -s flag. No checks are performed then, it just sorts.

FILES
       /etc/group
              group account information

       /etc/gshadow
              secure group account information

       /etc/passwd
              user account information

SEE ALSO
       group(5), passwd(5), shadow(5), groupmod(8)

EXIT VALUES
       The grpck command exits with the following values:

       0      success

       1      invalid command syntax

       2      one or more bad group entries

       3      can’t open group files

       4      can’t lock group files

       5      can’t update group files

AUTHOR
       Julianne Frances Haugh (jockgrrl AT ix.com)



                                  08/03/2005                          GRPCK(8)

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